1889012752639 has 4 divisors (see below), whose sum is σ = 1890012761280. Its totient is φ = 1888012744000.

The previous prime is 1889012752631. The next prime is 1889012752667. The reversal of 1889012752639 is 9362572109881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1889012752639 - 2³ = 1889012752631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889012752631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500001487 + ... + 500005264.

It is an arithmetic number, because the mean of its divisors is an integer number (472503190320).

Almost surely, 2^{1889012752639} is an apocalyptic number.

1889012752639 is a deficient number, since it is larger than the sum of its proper divisors (1000008641).

1889012752639 is a wasteful number, since it uses less digits than its factorization.

1889012752639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000008640.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 1889012752639 in words is "one trillion, eight hundred eighty-nine billion, twelve million, seven hundred fifty-two thousand, six hundred thirty-nine".